System and method for realizing network synchronization by packet network

Abstract

A system and method for realizing network synchronization by packet network mainly includes: restoring the clock signal from the superior processing equipment data link of the packet network, and sending it to the subordinate processing equipment; realizing the synchronization of said processing equipment based on said clock signal. It can realize the uniform timing of the whole network and change the IP network without the timing into the synchronous network, which is similarly with the circuit network, with high bandwidth. It can not only provide a circuit simulation service, but also a multi-service with high bandwidth.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of International Patent Application No. PCT / CN2006 / 002130, filed Aug. 22, 2006, which claims priority to Chinese Patent Application No. 200510093014.3, filed Aug. 24, 2005, both of which are hereby incorporated by reference.FIELD OF THE INVENTION[0002]The present invention relates to the communication field and in particular to a method and system for network synchronization over a packet network.BACKGROUND OF THE INVENTION[0003]Existing networks can generally be divided into two major types. One type is a synchronized circuit domain network which currently provides telephone service and can strictly guarantee a transmission delay and a transmission sequence of the service through synchronization timing throughout the network. The other type is a connectionless IP packet network which provides Internet data service and does not strictly guarantee the transmission delay or the transmission sequence of pac...

AI Technical Summary

Benefits of technology

[0005]Currently, an optional technical solution for network synchronization over an IP packet network is that a synchronization timing network is built together with the IP packet network in order to implement provision of circuit service over the IP packet network, and a method of superposition is adopted to meet requirement on network synchronization.

Problems solved by technology

The other type is a connectionless IP packet network which provides Internet data service and does not strictly guarantee the transmission delay or the transmission sequence of packets.

However, the existing IP network is still a connectionless network without synchronization.

When service of Best effort is provided, in some aspects, especially in respect of synchronization timing throughout the network, requirement on circuit service can not be met.

However, these solutions fail to solve essentially the problem of provision of timing throughout the IP packet network and pose to the contrary a high requirement on the network, which includes a transmission delay over the network, a packet loss ratio over the network.

The deterioration of any index may have deadly influence on the above solutions.

A synchronization network has to be built newly in the existing solution, which results in a drawback of a high network building cost.

Further, a data network and a circuit network have not been unified completely in the existing solution, which results in relatively difficult maintenance operations.

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